New evidence implicates alleged Boston marathon bomber Tamerlan Tsarnaev in a triple homicide in 2011. A reporter investigating the murders thinks the marathon bombings might have been avoided if police had pursued the murder investigation thoroughly.

At least one police officer was killed, another is in serious condition as law enforcement found the two men believed to be behind the Boston Marathon terrorist attacks. The first man, Tamerlan Tsarnaev, is believed to be dead, but Dzhokhar Tsarnaev is at large and the subject of a massive manhunt.